Machine for molding crayons.



New

PATBNTBD JUNE 30, 1903."

w. P. HANSQN. MACHINE PoR MOLDING cRAYoNs.

APPLICATION FILED SEPT. 17. 1902.

N0 MODEL.

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UNITED STATES Patented June 30, 1903.

WILLIAM F. HANSON,`OF LYNN, MASSACHUSETTS.`

MACHINE FOR MOLD'ING CR-AYONS.

SPECIFICATION forming part of Letters Patent No. 732,408, dated J' une30, 190,3.

Application filed September 17,1902. Serial No. 123.699. (No model.)

To @ZZ whom it may concern:

Beit known that 1, WILLIAM F. HANsoN, a citizen of the United States,residing at Lynn, in the county of Essex and State of Massachusetts,have invented new and useful Im# provements in Machines for MoldingCrayons, of which the following is a specification.

This invention' relates to machines for the manufacture ofwax crayons,the obj ectbeing to automatically mold and trim off'the buttends of saidcrayons and to eject said crayons from the mold by means of appropriatemechanism.

The invention consists o f a rotary mold provided with a series ofrecesses to receive the crayon material and mechanism to eject themolded crayons from said recesses, said mechanism consisting ofplungers, preferably formed in twoparts, one pivoted to the other, and astationary cam to impart a vertical reciprocatory motion to saidplungers during the rotation of said mold.

The invention again consists in the combination and arrangement of partsset forth in the following specication and particularly pointed out inthe claims thereof.

Referring to the drawings, Figure 1 is a plan view of my improvedmachine for molding crayons. Fig. 2 is a vertical longitudinal sectiontaken on line 2 2 of Fig. 1. Fig. 3 is a detail section taken' OngliIl@3 3 of Fig; 1. Fig. 4 is a development ofthe stationary c am by means ofwhich the plungers are raised and lowered. Fig. 5 is aside elevation indetail of a group of plunger'sand the reciprocatory slide to which theyare' attached. Fig. 6 is an enlarged side elevation of the upper part ofone of the plungers. j

Likenumerals refer to like parts through'- out the several views of thedrawings. 1n the drawings, 10 is a base-plate, and v11 a column fastthereto or integral therewith. Said column provides bearings 12 12 forthe vertical rotary shaft 13. Rotary motion is imparted to the shaft 13by means of the worm-gear 14, fastthereto and meshing into a worm 15,fast to a horizontal shaft 16, arrangedto rotate in bearings 17 17 uponthe column 11 and in a cap-bearing 18 upon the base-plate 10. The shaft16 is rotated by means of the tight and loose pulleys 19 20.

To the upper end of the shaft 13 is fastened a rotary mold 21. Said moldis provided with a iiange 22, extending around the periphery thereof andiuclosing a chamber 23, in which chamber is placed a freezing mixture24, of salt and ice. In the upper surface of the flange 22 is'provided agroove 25, concentric with the center of the mold 21, and extendingdownwardly from the bottom of said groove vis a series of verticalrecesses 26, adapted to receive the crayon material. Around theperiphery of the mold andlocated outside the recesses 26 is a passage 27connected at intervals with the chamber 23 by means of passages 23 and29, located, respectively, near the top and bottom of the passage 27 andforming a circulating means whereby the freezing'mixture passes throughthe lower passage 29, around the passage 27, and out through the passage2S into the chamber 23, said freezing mixture in the chamber 23 and inthe passage 27 being for the purpose of cooling the hot-wax compoundwhich enters the groove 25 through a spoutV 30, provided in a tank31,lled with the crayonmaterial, which is kept hot by a. steam-jacket32, surrounding the tank 31. The tank 31 is provided with a cover 33 andhas `in the interior thereofa rotary shaft 34, provided withstirring-arms 35, preferably pointing upward from said shaft.

`,The shaft 34 has a bearing at the upper end in `the cover 33 and inthe lower end upon the bottom of the tank 31 and is rotated by means ofa pulley 36, fast to the upper end'thereof and having rotary motionimparted thereto by means of a belt 37.

In each of the vertical recesses 26 is provided y a plunger 38forme'd intwo parts 39 and 40, pivoted to eachother at 41,`the upper end 39 beingprovided with a conical recess 52, 4into which a portion of the materialforming vthe Vwax crayons flows and forms a point for said rotatablymounted thereon, said roll normally resting upon or traveling along theupper edge of the cylindrical cam-plate 47. The camplate 47 is adjustably fastened by screws 4S to a vertical flange 49, extending aroundthe base l0.

A spring-knife 50, supported upon a bracket 51, fast to the base-plate10, Fig. 1, is arranged with its cutting edge projecting downwardly intothe groove 25, and as the mold 21 rotates the ends of the crayons whichproject into the groove 25 are trimmed olf by said knife.

The general operation of the machine is as follows: The material fromwhich the crayons are to be cast is placed in the steam-heated tank 3l.Said material is kept constantly agitated by the rotation of the shaft34 and the stirring-arms 35, fast thereto. The chamber 23 in the mold 21is iilled with a freezing mixture 24, of salt and ice, and is rotated bythe worm-gear 14 and worm 15. As the mold rotates the crayon material isallowed to iiow from the tank 31 into the groove 25 by opening thestop-cock G0, whereupon said material liows out of the tank al, throughthe spout 30, and into said groove. As the mold rotates the materialflows downwardly into the recesses 26 and into the conical recess 52 inthe upper part 39 of the plungers 3S and the freezing mixture 24 coolsthe crayon material and the same is solidified to wax crayons. After thecrayon has been cast in the mold, as hereinbefore set forth, any portionof the wax which projects beyond the recess and into the groove 25 istrimmed oif by the knife 50. 'lhe mold continues its rotation in thedirection of the arrow, Fig. 1, and the plungers 3S, together with theslides 43, remain stationary, the rolls 4G traveling along thehorizontal surface 53 of the cam-plate 47 until the said rolls arrive atthe raised portion 54, located at the line 3 3, Fig. 1, when said rolls,together with the vertical slides 43 and plungers 3S, are raised fromthe position shown in Fig. 2 to that shown in Fig. 3, and upon a furtherrotation of the mold said plungers are carried downwardly by the uppercamplate 58. The plungers in groups of three are thus raised, and as theupper part 39 of each plunger passes out of the recess 2G it is tippedupon its pivot 41, as shown in Fig. 3, bya stationary inclinedguide-plate 55, fast to the spout 30 of the tank 3l. The crayon fallsout of the upper part 39 of the plunger 38 when said part is in theposition shown in Fig. 3 and falls into an inclined trough 56 and slidesdown the same into a box or any desirable receptacle. As the moldcontinues upon its rotary motion a finger 57, fast tothe tank 31,projects downwardly into the groove 25 and prevents any wax or othermaterial from passing beneath the same when coming from the spout 30.

It is desirable in a machine of this construction to cast or to moldcrayons of dierent lengths, and in order to adapt the machine to thisfunction the cam-plate 47 is made adjustable upon the flange 49, beingslotted at 59 to allow said cam-plate to be raised and lowered, andafter being adjusted to the proper position said cam-plate is fastenedrigidly to the flange 49 by means of the screws 4S.

Having thus described my invention,what I claim, and desire by LettersPatent to secure, 1s-

1. In a machine for molding crayons, a roiary mold provided with anannular groove in its upper surface, concentric with said mold, and witha. series of vertical recesses to receive the crayon material extendingdownwardly from said groove, and means for ejecting the molded crayonsfrom said recesses.

2. In a machine for molding crayons, arotary mold provided with a seriesof vertical recesses to receive the crayon material arrangedconcentrically therewith, a plunger in each of said recesses, saidplungers each formed in two parts, pivoted together, and mechanism toreciprocate said plungers and eject the molded crayons from saidrecesses.

3. In a machine for molding crayons, a rotary mold provided with a,series of vertical recesses to receive the crayon material arrangedconcentrically therewith, a plunger in each of said recesses, saidplungers each formed in two parts, pivoted together, the upper part ofeach plunger provided with a conical recess in the top thereof, andmechanism to reciprocate said plunger and eject the molded crayons fromsaid vertical recesses. l

4. In a machine for molding crayons, a ro tary mold provided with: aseries of vertical recesses to receive the crayon material, arrangedconcentrically with said mold, a chamber located inside said verticalrecesses adapted to contain a freezing mixture, an outer passageextending around said mold, outside said vertical recesses, a passageconnecting said outer passage and chamber, whereby a circulation of saidfreezing mixture from said chamber and through said passage isestablished.

5. In a machine for molding crayons, a rotary mold provided with aseries of vertical recesses to receive the crayon material, arrangedconcentric With said mold, and a stationary knife located with itscutting edge in position to come in line with the tops of said recessesas said mold is rotated for the purpose specified.

G. In a machine for molding crayons, a rotary mold provided with aseries of vertical recesses to receive the crayon material, arrangedconcentrically therewith, a plunger in each of said recesses, saidplungers each formed in two parts pivoted together, mechanism to movesaid plungers upwardly in said recesses, and a stationary guide arrangedto engage the upper part of said plunger during its upward movement forthe purpose specified.

7. In a machine for molding crayons, a rotary mold, provided with anannular groove in its upper surface concentric with said mold IOO IIO

and with a series of vvertical recesses to re- In testimony whereof Ihave hereunto set A eeive the crayon material extending downmy hand inpresence of two subscribing Wit- Wardly from said groove, means foregeoting nesses.

the molded crayons from said recesses, and a WILLIAM F. HANSON. 5 tankadapted to contain heated crayon mate- Vitnesses:

rial and arranged t0 deliver said crayon ina- CHARLES S. GOODING,

terial into said groove. i FRANKLIN E. LOW.

